Image of an electric haul truck in the Berkeley Pit, which used a diesel motor to maneuver around the shovels and the dumps. Note the trolley and wires. This model of truck was not successful in Butte.

Image of an electric haul truck in the Berkeley Pit, which used a diesel motor to maneuver around the shovels and the dumps. Note the trolley and wires. This model of truck was not successful in Butte.

Image of an electric haul truck in the Berkeley Pit, which used a diesel motor to maneuver around the shovels and the dumps. Note the trolley and wires. This model of truck was not successful in Butte.

Image of the Anaconda Copper Mining Company's Butte Mines Machine Shop, including the mine's superintendent, shift foremen, assistant foremen, and shift bosses. The shop was located in the Parrot Mine yard. Dated in October 1955.